Citation: Ru. Ehlers et A. Gerwien, SELECTION OF ENTOMOPATHOGENIC NEMATODES (STEINERNEMATIDAE AND HETERORHABDITIDAE, NEMATODA) FOR THE BIOLOGICAL-CONTROL OF CRANE-FLY LARVAE TIPULA-PALUDOSA (TIPULIDAE, DIPTERA), Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz, 100(4), 1993, pp. 343-353